BROWSE

Related Researcher

Author

Song, Hyun-Kon
eclat: ElectroChemistry Lab of Advanced Technology
Research Interests
  • Electrochemical analysis, electroactive materials, electrochemistry-based energy devices

ITEM VIEW & DOWNLOAD

Doubling the capacity of lithium manganese oxide spinel by a flexible skinny graphitic layer

Cited 0 times inthomson ciCited 0 times inthomson ci
Title
Doubling the capacity of lithium manganese oxide spinel by a flexible skinny graphitic layer
Author
Noh, Hyun KukPark, Han-SaemJeong, Hu YoungLee, Sang UckSong, Hyun-Kon
Keywords
Ab initio calculations; Graphitic layers; Lithium manganese oxide; Lithium-ion batteries; Spinel
Issue Date
201405
Publisher
WILEY-V C H VERLAG GMBH
Citation
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, v.53, no.20, pp.5059 - 5063
Abstract
By coating nanoparticular lithium manganese oxide (LMO) spinel with a few layers of graphitic basal planes, the capacity of the material reached up to 220 mAhg-1 at a cutoff voltage of 2.5 V. The graphitic layers 1) provided a facile electron-transfer highway without hindering ion access and, more interestingly, 2) stabilized the structural distortion at the 3 V region reaction. The gain was won by a simple method in which microsized LMO was ball-milled in the presence of graphite with high energy. Vibratory ball milling pulverized the LMO into the nanoscale, exfoliated graphite of less than 10 layers and combined them together with an extremely intimate contact. Ab initio calculations show that the intrinsically very low electrical conductivity of the tetragonal phase of the LMO is responsible for the poor electrochemical performance in the 3 V region and could be overcome by the graphitic skin strategy proposed.
URI
Go to Link
DOI
http://dx.doi.org/10.1002/anie.201400490
ISSN
1433-7851
Appears in Collections:
UCRF_Journal Papers
ECHE_Journal Papers

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qr_code

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU